International SI uhlelo - olulodwa nesilinganiso uhlelo ezweni elisha

Kwaphela isikhathi eside emazweni ahlukahlukene (ngisho ezindaweni ezahlukene ezweni elifanayo!) Ukube ohlelweni lwaso angakahleleki. Uma nje abantu baye basinda kuqhathaniswa babodvwana, akukho inkinga ethile kule wayengekho. Nokho, ngenxa kwembulunga yonke kanye nokuthuthukiswa ophikweni olunamandla ngamazwe zomsebenzi, ukudalwa uhlelo umfaniswano izilinganiso sasingagwemeki.

Le nqubo Kwangithatha isikhathi impela isikhathi eside, futhi umphumela wayo kwaba uhlobo ebucayini phakathi izikole ezinkulu zesayensi zomhlaba, ngalinye elikwazi usephoqeleke ukuba abaleke zathamba. Ekugcineni, emgqeni wokugcina kwamenyezelwa ngo-1960, futhi samukelwa nini njengophawu ukhona namuhla uhlelo SI ngamazwe.

Ngokwawo emelela ethathwe ibinzana French Systeme International futhi kuyaqondakala hhayi nje noma imuphi usosayensi, kodwa futhi isakhamuzi abavamile, iziqu inkambo esikoleni esiphakeme. Enkabeni yalo, uhlelo SI iyiqoqo ebaluleke kakhulu amayunithi, kanye ingcaca abo enyama futhi. ukwamukelwa yayo akusho ukuthi zonke States abangene ngemvume usomqulu ezifanele, kumelwe siyiyeke izinhlelo zabo. Nokho, uma kuziwa emsebenzini, embukisweni inkantolo komphakathi weentjhabatjhaba, noma ubuchwepheshe okuthengiswa emhlabeni wonke, kukhona uhlelo SI uba Institute eyinhloko izilinganiso.

Kusukela ngo-1970 wanyathelisa abadumile SI ncwajana, okuyinto unikeza incazelo eningiliziwe kakhulu wonke amayunithi enkulu zokulinganisa, kanye imibiko indawo okuvela kuyo izinguquko zesimanje. Kuze kube manje, lo mbhalo zibhaliwe izikhathi eziyisishiyagalombili, futhi ngo-1985, kanye French kanye neyesiNgisi yavela. Kuwo wonke amazwe athuthukile, le ncwajana uyakhamba ulimi lwasendaweni.

SI uhlelo uyazicabangela njengoba main eziyisikhombisa lucobo. Lokhu imitha ikhilo amperes, Kelvin, wesibili, futhi Candela imvukuzane. Kukholakala ukuthi akukho neyodwa kulezi zinkolo nemingcele ngeke kutholakale bakwamanye, isb ngalinye kulawa amayunithi has a okuthiwa ubukhulu ezimele. Kususelwa kubo, esebenzisa kokuphindaphinda nokuhlukanisa kukhona okuphumayo iyunithi okunye, kanye aduduze. Izimpawu lezi zinto njalo elicwengisiswe, ne izifundo zesayensi ngokuvamile sina zisenza sibe isidingo ukwamukela izindinganiso ezintsha.

nobunzima ezithile SI uhlelo kwi-physics esiye sabhekana nalo ngenxa umehluko lokhona ekuphimisweni futhi elwa sokuqhafaza iyunithi, ke Akuyona imfihlo ukuthi, isibonelo, phakathi French futhi isipelingi Chinese ukuthini igama elithi "amakhilogramu" omkhulu umehluko ngokwanele. Kule ndaba, bekubonakala ngokukhethekile sigcizelelwa 1960 Charter konyaka ukuthi ukuqokwa amayunithi - ke akusenzi, futhi izinto algebraic ukuthi musa ancike olimini. Kwafika nobunzima kuphela ababevela eRussia nakwamanye amazwe ezisebenzisa incwadi non-Latin futhi Cyrillic. Indlela ukuphuma kulesi simo kwaba isinqumo langempela omphakathi wonke mayelana nokusetshenziswa kwezimpawu osobala uthi idatha.

Okwamanje, uhlelo SI, ngakolunye uhlangothi, uhlobo isiqinisekiso bangasephula imiqondo yesayensi eziyisisekelo, ngakolunye uhlangothi, kuba njalo isilungele izinguquko ezintsha nokuvukela.